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= J.-ANTHON.

OSGILLATORY GHAIN SAW MORTISER- No. 547,572. Patented Oct. 8, 1895.

' NIE.* A S Fmot' ATENT CSCILLATORY CHAINQSAW MORTISER.

SPECIFICATION forming part of Letters Patent No. 547,572, dated October8,1895. Application filed January 18, 1895 serial No. 535,409- (Nomodel.)

To aZZ whom it may concern.-

Beit known that I, J OHANN ANTHON, a subject of the Emperor of Germany,residing at Flensburg, Germany, have invented a certain new OscillatoryChain-Saw Mortiser for Making Quadrangular Holes in Wood, of which thefollowing is a specification.

In essentials the invention consists of a chain-like combined tool whoselinks have saw-teeth. This endless saw, being stretched over two rollsand put in rapid motion, intrenches itself into a piece of wood heldclose to it and by this cuts a quadrangular hole.

Figures 1 and 2 show the various constructions of the working chain inplan and side view each. Fig. 3, 4, and5 represent the machine with themounted working chain.

I have found two combinations of the working chain most suitable forthis purpose. As per Fig. 1, the chain consists of a number of thinplates (1, provided with saw-teeth, which plates are bolted togetherhingelike,two by two, with a thicker link 0, provided with a large sharpedge. The teeth of the plates d being alternately cross-cut-i. a, onetooth is bent a little outward, the other inward, as

this is the case with each ordinary saw-have to make two saw-cuts intothe wooden piece, the wood remaining between the two outs being takenaway by the links 0, provided with a sharp edge. Fig. 2 shows the otherconstruction. This chain consists of single thin plates fand f providedwith saw-teeth, which are bolted in such way that two exterior links ffollow two interior links f The teeth of all plates are cross-cutalternately inward and outward, so that each tooth takes away one partof the wood, and by degrees all the teeth by working together make ahole in the whole width of the chain. The endless chain runs 'over tworolls b and c, Fig. 3, of which the tion corresponding with the speed ofrotation of the wheel. The hole made by the sawteeth has the section ofthe chain systemviz., a length equal to the diameter of the under wheelplus the space occupied by both the chain-bands and a width equal to thethickness of the chain. Therefore with one chain only one hole of acertain length and width could be made; but to be able to cut with'oneand the same chain holes of various widths it has been arranged togiveto the chain during its working an oscillatory motion to both sidesacross the direction of the cut, so that the under part of the chainentering the wood makes the greatest lateral deviation, as shown by thedotted line in Fig. 3. This oscillatory motion of the working chainforms the second part of my invention.

As the oscillatory motions are executed in a very rapid succession whilethe chain-saw penetrates into the wood, the chain-saw cuts out a holewhose size depends on the deviation, as shown in the wood piece markedW. By giving to the chain a more or less strong deviation it makes wideror narrower holes. By this arrangement many chains of different sizesare rendered unnecessary and all sizes of holes can be made with one andthe same chain.

Figs. 3, 4,and 5 show the construction of the machine. The chain K iscarried by the plate a, in turn held by the carriage h. This carriagealso carries the bearings of an axis 0, upon which the upper chain-wheelt' is fixed. The carriage h is pivotally supported in the frame g, thusswinging at the center land by this occasioning the oscillatory motionthrough the medium of a connecting-rod p from a crank-axle or from aneccentric g, Fig. 4. The crank-axle or the eccentric is so constructedthat the stroke or the eccentricity may be altered in an easy manner,perhaps as per a scale, by which the stroke or the cocentricity can beexactly fixed for the desired width of the hole. In the drawings thepivot of the crank can be moved within a. dovetail groove formed in thecrank-disk g, and by this more or less eccentricity can be obtained.

The other parts of the machine are supposed to be known and found inother mortising-machines. The wooden piece is fixed by the chucks t upona slide m, which is lifted by the screw 3, by a lever, or by a rack,thus bringing the wood piece to the working chain. If long sash-holesare wanted, either several holes are mortised, one beside the other, bypushing the wooden piece horizontally, or while the tool penetrates bydegrees into the wood the latter can be allowed to make a horizontalmovement, as this is the case with the long-hole mortising-machines. Thedrivingpulley is carried on the shaft 0.

I claim 1. In combination in a mortising machine, a pivoted support,means for rocking said support on its pivot and an endless chain cuttersupported by and depending from the pivotal support and means foroperating the chain, the pivotal movement of the support 1 otal movementof the support acting to vibrate the chain laterally of the mortise,substantially as described.

In Witness whereof Ihave hereunto set my hand in presenceof twowitnesses.

J OI'IANN AN'lIION. Witnesses:

THOMAS MATTnIEsEN, WILHELM BRANnEs.

